Transactions of Materials and Heat Treatment

Title：Research on second-flow control and its application in hydraulic system AGC

Authors： Yang Jingming1 2 Ren Jingwei1 Sun Dujuan1 Che Haijun1 2

Unit： 1.Key Lab of Industrial Computer Control Engineering of Hebei Yanshan University Qinhuangdao 066004 China 2.National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Qinhuangdao 066004 China

KeyWords： automatic thickness control second-flow meters field programmable gate array shift register adaptive compensation

ClassificationCode：

year,vol(issue):pagenumber：2016,41(1):71-76

Abstract：

According to the issue that the thickness control precision is not met the requirements during the thickness control process by second-flow hydraulic automatic gauge control system due to the limitation of photoelectric encoder resolution, the mode of inserting a high-frequency pulse was used to improve the speed accuracy measured by the photoelectric encoder. The calculation results show that the speed measurement error decreases from 1.6% to 0.04% . A second-flow meter based on FPGA was designed to realize the high frequency pulse inserting, which is used in the second-flow hydraulic AGC system. The real data statistics indicates that the thicknesses error between the second-flow meter and thickness gauge for lateral plate of mill outlet is less than 0.1%. Therefore, the thickness accuracy measured by the second-flow meter can meet the requirement of the automatic thickness control system. The second-flow hydraulic AGC system based on the second-flow meter was applied in cold rolling, which brings a thickness control error within ±5 μm. As a result, the system is of good stability, high robustness and high practical value.

Funds：

国家自然科学基金资助项目(61074099);国家自然科学基金委员会与宝钢集团有限公司联合资助项目(U1260203);河北省高等学校创新团队领军人才培育计划资助项目(LJRC013)

杨景明（1957-），男，博士，教授

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